Reverse osmosis filter element assembly and filter device

Abstract

The utility model discloses a reverse osmosis filter element assembly and a filter device, comprising a reverse osmosis membrane filter element for obtaining pure water by adopting a reverse osmosis technology; the reverse osmosis membrane filter element is sleeved with the water collecting pipe, a plurality of water collecting holes are formed in the water collecting pipe, pure water filtered by the reverse osmosis membrane filter element is collected into the water collecting pipe through the water collecting holes, and a pure water outlet is formed in the side end of the water collecting pipe; the central pipe is sleeved in the water collecting pipe and is used as a water inlet channel of raw water; the upper end cover is arranged at the upper end of the reverse osmosis membrane filter element in a sleeving mode and attached to the water collecting pipe, a pure water channel is formed in the position, corresponding to the pure water outlet of the water collecting pipe, of the upper end cover, and filtered pure water is collected into a cavity formed by the filter element assembly and the shell of the filtering device through the pure water outlet in the side end and the pure water channel. The reverse osmosis filter element assembly disclosed by the utility model effectively solves the problem that the TDS (total dissolved solid) value of water in the water purifier head cup is increased.

Description

Technical Field

[0001] The utility model belongs to the field of filtering devices, and particularly relates to a reverse osmosis filter element assembly and a filtering device. Background Art

[0002] With the pursuit of the public for the quality of life, the level of water quality has begun to attract much attention. The water purification equipment with reverse osmosis function is more and more popular among the public because the purified water produced by it is fresher, more hygienic and safer. The reverse osmosis technology adopted in the water purifier is a technology that uses an artificial semi-permeable membrane to achieve ultra-high-precision filtration. The pore diameter of this semi-permeable membrane is extremely small, only between 0.5 and 10 nm. Under normal circumstances, water cannot pass through. Only by pressurizing the water on one side of the membrane can reverse osmosis be achieved to obtain water with a higher purity, and the concentrated water that cannot achieve osmosis will be discharged as waste water. Moreover, the reverse osmosis water purifier needs to be plugged in to provide power for the internal booster pump. Therefore, for the raw water filtered by the reverse osmosis technology, pure water with TDS meeting the direct drinking water standard can be obtained.

[0003] However, when the water purification equipment stops running and stands still for a long time, when it is restarted, the TDS of the first cup of pure water is on the high side, resulting in a low quality of the first cup of pure water and the water quality cannot meet the needs of users. This is because there is an osmotic pressure difference between the concentrated water and the pure water itself. When the reverse osmosis water purifier works, the booster pump will apply a pressure greater than the osmotic pressure to the raw water end, resulting in reverse osmosis. When the reverse osmosis water purifier stops working, this pressure will also disappear. At this time, there is still a solution in the membrane shell of the reverse osmosis membrane. At the beginning, the state is that the water in front of the membrane is concentrated water and the water behind the membrane is pure water. However, in the absence of an external pressure, as time goes by, the osmotic pressure difference recovers, and a two-way osmosis phenomenon will occur, that is, the pure water will permeate to the concentrated water side and the concentrated water will permeate to the pure water side until the two sides reach equilibrium, and at this time, the TDS value in the pure water cavity will increase.

[0004] Based on this, there is an urgent need for a new type of reverse osmosis filter element assembly to reduce the problem of high TDS value of the first cup of water. Summary of the Utility Model

[0005] Purpose of the Utility Model: The technical problem to be solved by the utility model is to provide a new type of reverse osmosis filter element assembly to reduce the problem of high TDS value of the first cup of water.

[0006] Technical Solution: The reverse osmosis filter element assembly of the utility model, the filter element assembly includes:

[0007] A reverse osmosis membrane filter element, which uses reverse osmosis technology to obtain pure water;

[0008] The water collecting pipe is sleeved on the reverse osmosis membrane filter element, and a plurality of water collecting holes are formed thereon. The pure water filtered by the reverse osmosis membrane filter element is collected into the water collecting pipe through the plurality of water collecting holes, and a pure water outlet is formed at the side end of the water collecting pipe.

[0009] The central pipe is sleeved inside the water collecting pipe and serves as the water inlet channel for the raw water.

[0010] The upper end cover is sleeved on the upper end of the reverse osmosis membrane filter element and is arranged in contact with the water collecting pipe. A pure water channel is formed thereon corresponding to the pure water outlet of the water collecting pipe, so that the filtered pure water is collected into the cavity formed by the filter element assembly and the housing of the filtering device through the pure water outlet at the side end and the pure water channel.

[0011] Furthermore, a sealing ring is connected and arranged at the pure water outlet of the water collecting pipe of the filter element assembly to form a sealed connection between the pure water outlet and the pure water channel opened on the upper end cover.

[0012] Furthermore, the top end of the upper end cover of the filter element assembly and the cavity formed by the central pipe and the water collecting pipe constitute a waste water cavity, and the port of the upper end cover is the corresponding waste water outlet.

[0013] Furthermore, a waste water flow channel is formed between the upper end cover of the filter element assembly and the upper end of the reverse osmosis membrane filter element. A plurality of diversion grooves are formed on the reverse osmosis membrane filter element, and the lower end of the diversion groove is communicated with the waste water flow channel to drain the filtered waste water into the waste water cavity through the diversion groove.

[0014] Furthermore, a sealed connection is formed between the outer side of the central pipe at the upper end of the pure water outlet of the filter element assembly and the inner side of the water collecting pipe.

[0015] Furthermore, the central pipe of the filter element assembly is fixedly connected to the inner side wall of the water collecting pipe through a connecting plate extending on its outer side wall.

[0016] Furthermore, a sealed connection is formed between the outer side of the lower end of the central pipe of the filter element assembly and the inner side of the water collecting pipe to form a pure water collection cavity through the sealed connections at the upper and lower ends.

[0017] Furthermore, the filter element assembly further includes a lower end cover arranged at the bottom end of the reverse osmosis membrane filter element, and a raw water cavity is formed between the two. A hole is formed at the lower end of the water collecting pipe to allow the raw water in the central pipe to flow into the raw water cavity.

[0018] A filtering device includes a housing and the above-mentioned reverse osmosis filter element assembly. The reverse osmosis filter element assembly is located inside the housing, and a cavity is formed between the two for accommodating the pure water flowing out of the pure water outlet at the side end of the water collecting pipe. A raw water inlet corresponding to the central pipe, a waste water outlet corresponding to the port of the upper end cover, and a pure water outlet communicated with the cavity are provided at the top end of the housing.

[0019] Beneficial effects: Compared with the prior art, the advantages of the present utility model are as follows: The reverse osmosis filter element assembly is provided with a central tube in the water collecting pipe as the raw water inlet channel, and a pure water outlet is opened at the side end of the water collecting pipe. Correspondingly, a pure water channel is provided on the upper end cover to collect the filtered pure water into the cavity formed by the housing of the filtering device and the filter element assembly, that is, the pure water is discharged from the side to increase the volume of the actual pure water cavity. Therefore, even if the TDS value of the pure water in the water collecting pipe increases due to the bidirectional osmosis caused by the shutdown of the water purifier, it will still not affect the overall TDS value of the pure water in the large-capacity cavity, so that the difference in the TDS value of the pure water obtained by filtration in the final filtering device is only ±10 PPM, effectively solving the pain point problem of the increase in the TDS value of the first glass of water in the field of water purifiers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the filter element assembly of the present utility model;

[0021] Figure 2 is a cross-sectional view of the filter element assembly of the present utility model Figure 1 ;

[0022] Figure 3 is Figure 2 an enlarged view of part A in

[0023] Figure 4 is a cross-sectional view of the filter element assembly of the present utility model Figure 2 ;

[0024] Figure 5 is Figure 4 an enlarged view of part B in

[0025] Figure 6 is Figure 4 an enlarged view of part C in

[0026] Figure 7 is a schematic structural diagram of the water collecting pipe of the present utility model;

[0027] Figure 8 is a schematic structural diagram of the central tube of the present utility model;

[0028] Figure 9 is a schematic diagram of the water flow direction of the filter element assembly of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] As Figure 1As shown in the figure, the reverse osmosis filter element assembly of the present utility model includes a reverse osmosis membrane filter element 1, a water collecting pipe 2 sleeved inside the reverse osmosis membrane filter element 1 and provided with a plurality of water collecting holes 3, a central pipe 5 sleeved inside the water collecting pipe 2, an upper end cover 6 and a lower end cover 13 respectively arranged at the upper and lower ends of the reverse osmosis membrane filter element 1, and a sealing glue or sealing tape can be further added at the upper end cover 6 and the lower end cover 13 of the reverse osmosis filter element assembly to improve the sealing performance of the overall filter element assembly.

[0031] As Figures 2 to 6 shown, the central pipe 5 of the reverse osmosis filter element assembly of the present utility model serves as the water inlet channel for raw water. That is, under the drive of a water pump, after the raw water enters through the central pipe 5, it flows upward through the reverse osmosis membrane filter element 1 at the bottom end of the lower end cover 13 and undergoes reverse osmosis, and then flows into the water collecting pipe 2 through the water collecting holes 3 for collection. A raw water cavity 14 is formed between the bottom end of the reverse osmosis membrane filter element 1 and the lower end cover 13, and a hole 15 is provided on the corresponding water collecting pipe 2 so that the raw water in the central pipe 5 can enter the raw water cavity 14 through the hole 15 and obtain pure water after being filtered by the reverse osmosis membrane filter element.

[0032] As Figure 7 shown, a pure water outlet 4 is provided at the side end of the water collecting pipe 2. There can be two pure water outlets 4, which are symmetrically arranged on the left and right, or can be flexibly arranged according to actual needs. The upper end cover 6 is sleeved and fitted with the water collecting pipe 2. And a pure water channel 7 communicating with it is provided on the upper end cover 6 corresponding to the pure water outlet 4 at the side end of the water collecting pipe 2. A sealing ring is also provided at the connection between the water collecting pipe 2 and the pure water channel 7 to improve the sealing performance of their connection. By providing a pure water outlet 4 at the side end of the water collecting pipe 2 and a pure water channel 7 corresponding to the upper end cover 6, the present utility model enables the pure water collected in the water collecting pipe 2 to flow into the cavity formed by the filter element assembly and the housing of the filtering device through the pure water outlet 4 and the pure water channel 7, thereby increasing the water volume of the pure water of the filtering device of the present utility model.

[0033] A sealing ring 16 is provided at the upper ends of the central pipe 5 and the water collecting pipe 2 located at the side end of the pure water outlet 4 of the water collecting pipe 2 to improve their sealing performance, so as to promote the pure water in the water collecting pipe 2 to flow out through the pure water outlet 4 at the side end of the water collecting pipe 2 and the pure water channel 7, and then collect in the cavity formed by the filter element assembly and the housing of the filtering device. Sealing rings 16 are also provided at the lower ends of the central pipe 5 and the water collecting pipe 2 for sealed connection. The setting of the sealing ring 16 forms a pure water collection cavity 12 in the water collecting pipe 2. The central pipe 5 is fixedly arranged on the inner side wall of the water collecting pipe 2 through a connecting plate 11 extending from its outer side wall. As Figure 8 shown, the setting position of the connecting plate 11 can be above the sealing ring 16 at the upper ends of the central pipe 5 and the water collecting pipe 2.

[0034] A wastewater flow channel 9 is formed between the upper end cover 6 of the present utility model and the upper end of the reverse osmosis membrane filter element 1. That is, the raw water enters through the lower end of the reverse osmosis membrane filter element 1 and the wastewater filtered after reverse osmosis flows out through this wastewater flow channel 9. The water collecting pipe 2 is provided with a diversion groove 10 for guiding the discharge of the wastewater. Similarly, two such diversion grooves 10 can be provided, respectively located on both sides of the reverse osmosis membrane filter element 1, and are arranged in a cross shape with the pure water outlets 4 on both sides. The bottom end of the diversion groove 10 is communicated with the wastewater flow channel 9, and the top end of the diversion groove 10 is communicated with a wastewater cavity 8 formed by the upper end cover 6, the water collecting pipe 2 and the central pipe 5. And the port of this wastewater cavity 8 is the wastewater outlet, which is communicated with the wastewater interface on the outer shell of the filtering device.

[0035] The filtering device composed of the reverse osmosis filter element assembly of the present utility model further includes a housing for accommodating the reverse osmosis filter element assembly, and a cavity is formed therebetween for accommodating the pure water flowing out from the pure water outlet 4 at the side end of the water collecting pipe 2. The top end of the housing is provided with a raw water inlet corresponding to the central pipe 5, a wastewater outlet corresponding to the port of the upper end cover 6, and a pure water outlet communicated with the cavity.

[0036] As Figure 9 shown, the water flow direction of the reverse osmosis filter element assembly of the present utility model is that the raw water flows in through the water inlet channel of the central pipe 2 under the pressure drive of the water pump, circulates in the direction from the bottom to the top of the reverse osmosis membrane filter element 1, and through the reverse osmosis effect of the reverse osmosis membrane filter element 1, the obtained pure water is collected in the water collecting pipe and flows through the pure water outlet at the side end of the water collecting pipe and the pure water flow channel on the upper end cover to be stored in the cavity of the outer shell of the filtering device and the reverse osmosis filter element assembly. The filtered wastewater is discharged through the wastewater flow channel formed by the upper end cover and the reverse osmosis membrane filter element 1 under the guidance of the diversion groove on the water collecting pipe and through the wastewater cavity at the top end of the upper end cover. That is, the reverse osmosis filter element assembly of the present utility model sets the central pipe in the water collecting pipe as the raw water inlet channel, opens the pure water outlet at the side end of the water collecting pipe, and correspondingly sets the pure water channel on the upper end cover to collect the filtered pure water into the cavity formed by the outer shell of the filtering device and the filter element assembly, that is, increases the volume of the actual pure water cavity by side-out of pure water. Furthermore, even if the TDS value of the pure water in the water collecting pipe increases due to the reverse osmosis caused by the shutdown of the water purifier, it will still not affect the overall TDS value of the pure water in the large-capacity cavity, so that the difference in the TDS value of the pure water finally filtered by the filtering device is only ±10 PPM, effectively solving the pain point problem of the increase in the TDS value of the first glass of water in the water purifier field. In addition, by setting the wastewater outlet, pure water outlet and raw water inlet at the same end, the convenience of subsequent combination with other functional filter elements is improved.

Claims

1. A reverse osmosis filter element assembly, characterized in that, The filter element assembly includes: A reverse osmosis membrane filter element (1), which uses reverse osmosis technology to obtain pure water; A water collecting pipe (2), which is sleeved on the reverse osmosis membrane filter element (1), and is provided with a plurality of water collecting holes (3) thereon. The pure water filtered by the reverse osmosis membrane filter element (1) is collected into the water collecting pipe (2) through the plurality of water collecting holes (3). A pure water outlet (4) is provided at the side end of the water collecting pipe (2); A central pipe (5), which is sleeved in the water collecting pipe (2) and serves as an inlet channel for raw water; An upper end cap (6), which is sleeved on the upper end of the reverse osmosis membrane filter element (1) and is attached to the water collecting pipe (2). A pure water channel (7) is provided thereon corresponding to the pure water outlet (4) of the water collecting pipe (2), so that the filtered pure water is collected into the cavity formed by the filter element assembly and the housing of the filtering device through the pure water outlet (4) at the side end and the pure water channel (7).

2. The reverse osmosis filter element assembly according to claim 1, characterized in that, A sealing ring is provided at the connection of the pure water outlet (4) of the water collecting pipe (2) to form a sealed connection between the pure water outlet (4) and the pure water channel (7) provided on the upper end cap (6).

3. The reverse osmosis filter element assembly according to claim 1, characterized in that, The top end of the upper end cap (6) forms a waste water cavity (8) with the cavity formed by the central pipe (5) and the water collecting pipe (2), and the port of the upper end cap (6) is the corresponding waste water outlet.

4. The reverse osmosis filter element assembly according to claim 3, characterized in that, A waste water flow channel (9) is formed between the upper end of the upper end cap (6) and the upper end of the reverse osmosis membrane filter element (1). A plurality of diversion grooves (10) are provided on the reverse osmosis membrane filter element (1), and the lower end of the diversion groove (10) is communicated with the waste water flow channel (9) to drain the filtered waste water into the waste water cavity (8) through the diversion groove (10).

5. The reverse osmosis filter element assembly according to claim 1, characterized in that, A sealed connection is formed between the outer side of the central pipe (5) at the upper end of the pure water outlet (4) and the inner side of the water collecting pipe (2).

6. The reverse osmosis filter element assembly according to claim 1, characterized in that, The central pipe (5) is fixedly connected to the inner side wall of the water collecting pipe (2) through a connecting plate (11) extending on its outer side wall.

7. The reverse osmosis filter element assembly according to claim 5, wherein, A sealed connection is formed between the outer side of the lower end of the central pipe (5) and the inner side of the water collecting pipe (2) to form a pure water collection cavity (12) through the sealed connections at the upper and lower ends.

8. The reverse osmosis filter element assembly according to claim 1, wherein, The filter element assembly further includes a lower end cap (13) provided at the bottom end of the reverse osmosis membrane filter element (1), and a raw water cavity (14) is formed between the two. A hole (15) is provided at the lower end of the water collecting pipe (2) to allow the raw water in the central pipe (5) to flow into the raw water cavity (14).

9. A filtering device, characterized in that, The filtering device includes a housing and the reverse osmosis filter element assembly according to claim 1. The reverse osmosis filter element assembly is located in the housing, and a cavity is formed between the two for accommodating the pure water flowing out of the pure water outlet at the side end of the water collecting pipe (2). A raw water inlet corresponding to the central pipe (5), a waste water outlet corresponding to the port of the upper end cap (6), and a pure water outlet communicated with the cavity are provided at the top end of the housing.

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